Lock for bascule-bridges.



E C. KRASE LUCK FR BASGULE BRIDGES.l

APPLICATION FILED MAR. 14, 1912.

EL LOCK FOR BASGUL' E BRIDGES.

APPL1CTD3H.L;LED HAR. 14, 1912.

Patente@ ont. 22, 1912,

HERMAN C. .KR/ASE, OF CHICAGO, ILLINOIS.

LOCK FOR BASCULE-BRIDGES.

Specification of Letters Patent.

' rateateaoet. ee. tere.

Application filed March 14, 1912. Serial No. 683,730.

structions and arrangements herein de.

scribed and claimed. A requisite of a loch for such a struct-ure is that it shall firmly hold some portion of the bridge, in such a way that the strains of the lcount-erweightl will be taken up, and yet the lock must be of such a construction that it maybe readily withdrawn so as to permit the swinging o the bridge.

My main object therefore is to provide al device in which the strains are taken up by the lock and one which is easily manipulated so as to permit'the bridge to open.

A further object of my invention is to provide locking means of great power for forcing the heel of the counterweight tightly against the bumping block so as to prevent any movement of the bridge while in use.

A further object oi' my invention is to providea simple device for locking a bascule or lift bridge which has few parts and which is therefore not liable to get out of order, these parts being such that they may be easily replaced when worn.

Other objects andv advantages will appear in the following specification, and the novel features of the device will be particularly pointed out in the appended claims..

ll/Iy invention isv illustrated in the accompanying drawings forming part ot this applicat-ion in which similar reference characters indicate llike parts in the several views, and in which,

Figure l is -a side view of my invent-ion as applied to a bascule bridge; Fig. 2 is a detail view of my improved lock showing its different positions with respect to the bridge; Fig. 3 is a sectional view along the line 8 3 ot Fig. l; Fig. il is a view oi' a modified form of locking device; Fig. 5 is a sectional view along the line 5 of Fig. 1i; and Fig. 6 is a perspective view showing a portion ot' the central part ot one of the locked members.

Inl order to give a thorough understanding et' the invention, I have shown certain parts of a bascule bridge and will briefly refer to these parts since they. constitute no part ott my invention except in so far as they cooperate with my locking means.

Referring now tol Fig. 1, A .represents in general a bascule,jbridge having a rocker or -rolling segment-"B which rolls on a track C, on the pier I). At W is `shown a counter-A weight which is provided with an extension cu at its rear'end arranged to engagea bumper Y. In orderfo'r the bridgetoswing, the roadway is divided at R, the portion a" being on the bridge proper and-the portion fr being pn the approach to the bridge. I have indicated diagrammatically the operating pinion at 0, but the means for operating the bridge, as stated before, forms no part of my invention. Projecting rearwardly from the extension fw or' the counterweight W is a heel 'H with which 'my improved locking, member is arranged to coperate. While I have shown one counterweight and one locking member in Fig. 1,' it: will be understood that there are two, one on each side of the roadway, as shown in the modified form in Fig. 4. A description of one of these looking members will suiiice,

however, since lthey aire precis'ely the same.

Referring now to .Figs 2 .and 3, itgwill be seen that attached to the anchor column S is a bracket Tte which is pivotally secured one arm e' of ,the locking member V. The arm r has one-.Zend formed in the manner shown in F ig..6. ft will be seen from this figure that there is va semi-cylindrical bearing lo on one-half of the end andl a cylindrical -bearing fvg on the other half# ri`he abutting end lof the other member or arm om is similarly arranged so that when these members are pivoted together by means of a pin, such as that shown at E in Fig. 2, they will form a toggle joint. rlhe end of the member 'um is provided with a shoulder oa, which is arranged to engage the heel II on the extension w of the counterweight W. Pivotally secured to the pin E by means of links L is a piston rod m of a piston M carried by the cylinder G. It will be noted from an inspection of Fig. 2 that the toggle joint has a slight play at its center, a space such as that shown at e being left on one side or the other according as to whether the parts 'u and um are in alinement or not. Springs Il may be provided to normally hold the two members o and' d various parts of the device, the operation thereof may be readily understood.-

The normal position of the locking device is shown in Fig. 1. In this position, the bridge is open for traiiicand the extension 'w of the counterweight W is firmly held against the bumper or abutment When now it is desired to unlock the bridge so as to permit thefcounterweight W to enter the pit Q between the piers P and p, the air on one side of the piston M, see Fig: 2, may be withdrawn and compressed air [may -be forced in the other side by any suitable means, thereby flexing the toggle'joint in the manner shown in Fig. 2, and causing .the shoulder oa' to leave the heel H so as to-perj mit the bridge to'be moved. The locking operation. is precisely reverse of this for the piston M may be caused to ,drivethe toggle joint forward, and when the shoulder [wa comes in contact with,. the.heel Il a 'fur-ther movement ofthe piston-*tends to straighten? out the toggle joint and therefore to force' the exteision w into'close contact with the bumperA Y, thereby holding the' bridge s`ecurely from'mo'vement. lIt will lie-seen' that th'e toggle joint, can be iieiredr` 'only-1a: short,

' necierv 'lock is mounted under 'tliejapproitltro distance owing to theA engagement of' the semi-spherical bearing parts. l lt vtheffe-flare cannot collapse, but is always ini aV esiti to be instantly 4applied,oi-fretracteg form of the device, the anchor columns Sa aipl Si? on opposite sides of the-roadway h vej secured tothem locking members V andV b of the type already described. Connect d with the pivot pins E of each of these lool; members are links such 'as that shoivjn at l?, these links in turn beingconl to`a guide block K arranged to travel on guidesfsuch as those shown 'at .X'. The block l is threaded to receive the threaded end of a rod .-l to which a gear/I is secured.l The latter is arrangedv to mesh with the gear l on a shaft J `which extends to the operating house (not shown). Fig. 4 shows this form ofloclring means in-its normal position, but in orderto `unlock the device it is only necessary to turn the shaft I either manually or by power means 'when tl Ithrough the engagement of the gears l and l the rod J will be revolved. This rod., v

as will be seen from Fig. 4, is provided at oneend with a leftehand screw and at the of the toggle members and withdrawing them from the portions H of the bridge.

It will be seen that I have provided a strains but which may be easily moved' so as to .lock or unlock the bridge. vIf the parts become worn they can be 'readily replaced. claim:- 4

1. -The combination with a lift or 4bascule .'bridge,=`of a locking device therefor, said locking device comprising a toggle joint, :one end'V of .said toggle joint being pivoted f' in a'xedposition and the lother end being 1 2. "The combination with alift or bascule bridge, lof a'locking device therefor, said end 'ofysaid to, ,"i2;1eI joint being pivoted ina .fixedji'osnition,v `the ther end being arranged l for flexing t .j oint'...I

e centralfportion of ,theftoggl'e 673.:T1e vcloxnbii'iation with! a or bascule ,ch'side-of the"ro adw ay, eachfof l said deyices'comprising a toggle joint, one of; the'armsof'` the said tog le joint being pivotally; attached to'fa x'e support, and "theother arm bei-ng'provided with a shoulv bridge, means for flexing both of said toggle joints simultaneously, said means comprising a rod having a-righthandedf screw at one end and a' left-handed screw at the 4. Thecombination'with a lift'or basculev bridge, of a locking device therefor comprising' a toggle joint consisting of two" arms arms being provided with a shoulder ar'- ra-nged to engagea shoulder on the companion arm for limiting the pivotal' movement port.

-v HERMAN. C. KRASld n Witnesses: Y

v "D LDWIG A. D. GATHEMNif .other end with a right-hand screw, "andffit:

lil Airuno '0. Damas.

curved arrow in Fig. 4, thereby flexing both A arranged' to 'engage a portion of the bridge.l

'locking device comprising a toggle joint, one

ide/ii 'arranged to engagea portion Aof the simple device which will stand numerous to engagea ortion ofthe bridge,`and' means j 90 'bridgdofga pair of locking devices-therefor, 2 0h69.' i

ion

other, a block arranged: to be engaged by pivotally connected together, each of, said;

Arit ofrthe joint, one ofsaid-arms beingprovided l 

